JPH0592049U - Oil tank - Google Patents

Abstract

(57) [Summary] [Structure] An opening 36a formed in a partition member 36 for vertically partitioning the inside of the tank main body 2 with a filter 30 for oil supplied from an oil supply port 5 formed in the upper portion of the tank main body 2. And is supported in a suspended manner by the peripheral portion of the opening 36a through the flange 32a formed on the outer periphery. The filler opening 5 is opened and closed by a cap 6, and a breather is formed above the partition member 36. Between the lower surface of the flange 32a and the upper surface of the peripheral portion of the opening 36a, and between the outer peripheral surface of the oil supply oil filter 30 and the inner peripheral surface of the opening 36a, the upper space and the lower space partitioned by the partition member 36. A ventilation gap that communicates with the side space is formed. [Effect] The mesh of the oil filter for refueling can be made finer to enhance the foreign matter removing effect, and the internal pressure of the tank body can be prevented from rising to prevent oil from leaking to the outside of the tank.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil tank provided in a hydraulic circuit of a hydraulic power steering device, for example.

[0002]

[Prior Art]

 A conventional oil tank 100 shown in FIG. 7 has a tank body 101 for storing oil, an opening / closing cap 103 for an oil supply port 102 formed at an upper portion of the tank body 101, and an inside of the tank body 101 vertically A partitioning member 104 and an oil filter for refueling which is inserted into an opening 105 formed in the partitioning member 104 and is supported by a peripheral portion of the opening 105 through a flange 106a formed on the outer periphery in a suspended manner. And 106. In addition, the cap 103 located above the partition member 104 is provided with a ventilation passage 107 capable of ventilating the inside and the outside of the tank body, thereby forming a breather for preventing an increase in the internal pressure of the tank body. There is.

[0003]

[Problems to be solved by the device]

 In the oil tank 100 having the above structure, the inside of the tank body 101 is vertically divided by the partition member 104, so that the upper space 109 and the lower space 110 partitioned by the partition member 104 are the oil supply oils. The air is vented through the mesh of the filter 106 as indicated by the arrow in the figure. It is desired that the mesh of the oil filter for oil supply 106 be fine in order to effectively remove foreign matters in the oil.

However, if the mesh of the refueling oil filter 106 is made finer, the air permeability between the upper space 109 and the lower space 110 is reduced, and the lower space 110 becomes a closed space and the ambient temperature rises. In such a case, the internal pressure rises. When the internal pressure of the lower space 110 thus rises, the oil level S of the oil stored in the tank body 101, which is indicated by the alternate long and short dash line in the figure, lowers in the lower space 110 and rises in the upper space 109. The rise of the oil level in the upper space 109 causes a problem that oil leaks to the outside of the tank from the gap between the vent passage 107 and the cap 103 that form the breather and the oil supply port 102.

Therefore, it is conceivable to provide the partition member 104 with the ventilation opening 108 as shown in the figure. However, when the opening 108 is enlarged, when the oil surface is wavy due to vibration or the like, the oil is scattered from the opening 108 to the upper space 109, and the ventilation passage 107 or the cap 103 and the oil supply port 102 forming the breather are formed. There is a risk that the oil may leak to the outside of the tank through the gap between the oil tank and the tank, or the oil may flow into the tank through the opening 108 without being filtered by the oil filter for oil supply during oil supply. Further, if the opening 108 is made small, when the oil surface is wavy, the opening 108 is closed by the oil film, and the ventilation function cannot be achieved.

An object of the present invention is to provide an oil tank that can solve the above technical problems.

[0007]

[Means for Solving the Problems]

 The features of the present invention are that a tank main body for storing oil, a cap for opening and closing a filler opening formed at the top of the tank main body, a partition member for vertically partitioning the inside of the tank main body, and this partition An oil filter for oil supply, which is inserted into an opening formed in the member and is supported in a suspended manner by the peripheral portion of the opening via a flange formed on the outer periphery, and a breather is formed above the partition member. The upper part of the oil tank that is partitioned by the partition member between the lower surface of the flange and the upper surface of the surrounding area of the opening, and between the outer peripheral surface of the oil supply oil filter and the inner surface of the opening. The point is that a ventilation gap is formed that connects the side space and the lower side space.

[0008]

According to the configuration of the present invention, even if the mesh of the oil filter for refueling is made fine, the upper space and the lower space partitioned by the partition member are the lower surface and the opening of the flange of the oil filter for refueling. Ventilation is carried out through the ventilation gap between the upper surface of the peripheral portion of the fuel tank and the upper surface of the refueling filter and between the outer peripheral surface of the fuel filter and the inner peripheral surface of the opening. Therefore, the space on the lower side communicates with the external space of the tank through the breather, and does not become a closed space.

Further, even if the oil surface undulates due to vibration or the like and the ventilation gap is closed by the oil film, the oil supply oil filter is only supported in a suspended manner by the peripheral portion of the opening via the flange. Since it is not fixed, the oil filter for refueling will rock if vibration such as wavy oil surface occurs. As a result, the distance between the lower surface of the flange and the upper surface of the peripheral portion of the opening and the facing distance between the outer peripheral surface of the oil supply oil filter and the inner peripheral surface of the opening are changed, and the oil film that closes the ventilation gap is eliminated. be able to.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

The oil tank 1 shown in FIGS. 1 and 5 is provided, for example, in a hydraulic circuit of a hydraulic power steering device, and is formed on a tank main body 2 for storing oil and an upper portion of the tank main body 2. A cap 6 for opening and closing the oil supply port 5, an inflow hose connecting cylinder 7 forming an oil inlet 3 to the tank body 2, and an outflow hose forming an oil outlet 4 from the tank body 2. A connecting cylinder 8, an oil supply oil filter 30 interposed between the oil supply port 5 and the outlet 4, and a return oil oil filter 60 interposed between the inlet 3 and the outlet 4. There is.

The tank body 2 is made of synthetic resin and is formed by vibration welding an upper member 2A and a lower member 2B. Inside the tank main body 2, an oil inflow chamber 51 surrounded by the side wall 2a of the tank main body, the bottom wall 2b of the tank main body 2, and the inner wall 50 inside the tank main body 2 is formed. Part of the oil filter 60 is constituted by the oil filter 60, and oil flows into the oil inflow chamber 51 from the inflow port 3.

An annular convex portion 35 is integrally formed with the tank body 2 below the oil supply port 5, and a partition member 36 made of synthetic resin is vibration welded to the lower end of the annular convex portion 35. The partition member 36 partitions the inside of the tank body 2 into an upper space 15 and a lower space 16, and as shown in FIGS. 2 and 3, a ring having an opening 36a formed in the center thereof. Four convex portions 36b having an arc shape in plan view are integrally formed on the upper surface of the peripheral portion of the opening 36a. A peripheral groove 36c is formed on the outer periphery of the upper surface of the partition member 36, and the lower end of the annular convex portion 35 is inserted into and welded to the peripheral groove 36c.

The oil filter 30 for refueling is formed by sandwiching a cylindrical filter body 31 composed of a nylon mesh with an outer frame 32 and an inner frame 33 made of synthetic resin, and A flange 32a is formed on the outer periphery of the upper end of the frame 32. The oil filter 30 for refueling is inserted into the opening 36a of the partition member 36, and is supported by the peripheral portion of the opening 36a in a suspended manner via the flange 32a.

As shown in FIG. 4, between the lower surface of the flange 32 and the upper surface of the peripheral portion of the opening 36a, and between the outer peripheral surface of the oil supply oil filter 30 and the inner peripheral surface of the opening 36a, Ventilation gaps 40 and 41 that connect the upper space 15 and the lower space 16 that are partitioned by the partition member 36 are formed. That is, since the convex portion 36b is formed on the upper surface of the peripheral portion of the opening 36a as described above, the convex portion 36b is formed between the lower surface of the flange 32 and the upper surface of the peripheral portion of the opening 36a. Ventilation gaps 40 are formed at intervals according to the height of the. Further, the outer diameter of the insertion portion of the oil filler 30 for refueling into the opening 36a is smaller than the inner diameter of the opening 36a, so that the ventilation gap 41 is formed at a distance corresponding to the difference between the outer diameter and the inner diameter. ing.

The cap 6 is formed by fitting the inner peripheral member 6b into the outer peripheral member 6a, and the level cage 20 is detachably attached to the inner peripheral member 6b. Further, a leaf spring 22 is attached to the inner peripheral member 6b, and the leaf spring 22 is inserted into the tank body 2 through a notch 23 formed in an inward flange 25 surrounding the oil supply port 5. When the cap 6 is rotated after the insertion into the tank body 2, the inward flange 25 is sandwiched between the leaf spring 22 and the inner peripheral member 6b, and the cap 6 is fixed thereby. A seal ring 21 is interposed between the inner peripheral member 6b and the inward flange 25. Further, a through hole 6c formed in the inner peripheral member 6b and a groove 6d formed between the outer peripheral member 6a and the inner peripheral member 6b facing each other form a ventilation passage for communicating the inside and the outside of the tank body 2. As a result, a breather is formed above the partition member 36. Further, the inner peripheral member 6b is formed with an oil scattering prevention surface 6e that covers above the opening 36a of the partition member 36, and when the oil surface S of the oil stored in the tank main body 2 is corrugated, the oil is breathered or filled. Prevents leakage through the gap between the cap and the cap 6.

On the outer peripheral surface of the tank body 2, graduations 45 and 46 that define the maximum position and the minimum position of the oil surface S of the oil are formed, and the specified maximum position of the oil surface S is the ventilation gap 40, It is below 41.

In the present embodiment, the level gauge 20 has an insertion portion 20a formed at the upper end, and the insertion portion 20a is fitted into the recess 6f formed in the inner peripheral member 6b of the cap 6 and formed in the insertion portion 20a. It is prevented from coming off by the formed protrusion 20b. By making the cap 6 and the level gauge 20 separate in this way, even if the standard level of the oil level S differs depending on the diameter and height of the tank body 2, only the level gauge 20 has the standard level of the oil level S. Since different caps can be used, the cap 6 can be shared and the die cost of the cap 6 can be reduced. The level gauge 20 may be screwed into the cap 6, or as shown in FIG. 6, an annular projection 20c formed on the upper end of the level gauge 20 is inserted into a circumferential groove 6g formed on the bottom surface of the cap 6 and welded. You may do so.

According to the above configuration, the upper space 15 and the lower space 16 partitioned by the partition member 36 are ventilated from each other through the ventilation gaps 40 and 41. Therefore, the lower space 16 communicates with the outer space of the tank through the breather and is vented as shown by the arrow in the figure, so that even if the mesh of the filter body 31 is closed by the oil film, it becomes a closed space. The internal pressure never rises. Further, even if the oil surface S is undulated due to vibration or the like and the ventilation gaps 40 and 41 are closed by the oil film, the oil supply oil filter 30 is only supported in a suspended state and is not fixed. When vibration such as wavy surface S occurs, the oil supply oil filter 30 swings, and the flange 32a of the oil supply oil filter 30 faces the upper surface of the opening 36a of the partition member 36, and The facing distance between the outer periphery of the oil filter 30 and the inner periphery of the opening 36a of the partition member 36 changes, and the oil film that closes the ventilation gaps 40 and 41 can be eliminated. As a result, the mesh of the filter body 31 can be made finer to improve the foreign matter removing function, and the oil can be prevented from leaking from between the breather or the cap 6 and the filler opening 5.

The present invention is not limited to the above embodiment. For example, although the breather is formed on the cap 6 in the above-mentioned embodiment, it may be formed on the tank body 2 above the partition member. Further, in the above embodiment, the ventilation gap 40 is formed by forming the convex portion 36b on the upper surface of the peripheral portion of the opening 36a. However, the convex portion is formed on the lower surface of the flange 32a of the oil filter 30 for refueling, and the ventilation portion 40a A gap may be formed. In short, a ventilation gap may be formed between the upper surface of the peripheral portion of the opening 36a and the lower surface of the flange 32a.

[0021]

[Effect of the device]

 ADVANTAGE OF THE INVENTION According to the oil tank of the present invention, the mesh of the oil filter for refueling can be made finer to enhance the foreign substance removal effect, and the internal pressure of the tank body can be prevented from rising to prevent oil from leaking out of the tank. it can.

[Brief description of drawings]

FIG. 1 is a sectional view of an oil tank according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is an explanatory view of a main part of an oil tank according to an embodiment of the present invention.

FIG. 5 is a plan view of an oil tank according to an embodiment of the present invention.

FIG. 6 is a view showing a modified example of the oil tank cap.

FIG. 7 is a sectional view of a conventional oil ill tank.

[Explanation of symbols]

 1 Oil Tank 2 Tank Main Body 5 Refueling Port 6 Cap 30 Refueling Oil Filter 36 Partition Member 36a Opening 40, 41 Ventilation Gap

Claims (1)

[Scope of utility model registration request] 1. A tank main body for storing oil, a cap for opening and closing an oil supply port formed in the upper part of the tank main body, and a partition member for vertically partitioning the inside of the tank main body.
An oil filter for oil supply, which is inserted into an opening formed in the partition member and is supported in a suspended manner by a peripheral portion of the opening via a flange formed on the outer periphery, and a breather is provided above the partition member. In the formed oil tank, the upper side partitioned by the partition member between the lower surface of the flange and the upper surface of the peripheral portion of the opening and between the outer peripheral surface of the oil filter for oil supply and the inner peripheral surface of the opening. An oil tank characterized in that a ventilation gap is formed to connect the space and the lower space.